Anonymous; Boomker, Jacob Diederik Frederik(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
Anonymous; Boomker, Jacob Diederik Frederik(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
Anonymous; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verwoerd, Daniel Wynand; Walker, Jane B.; Verster, Anna Johanna Maria(Pretoria : The Government Printer, 1981)